Diving mask



FIG. 1 is a left side perspective view of a diving mask embodying my newdesign, the opposite side being substantially a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof.

The ornamental design for a diving mask, as shown and described.